package com.wc._16届国特冲刺营._02动态规划_背包问题终结者.划分权重;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.StringTokenizer;

/**
 * @Author congge
 * @Date 2025/5/6 23:09
 * @description
 * https://www.lanqiao.cn/courses/51805/learning/?id=4071544&compatibility=false
 */
public class Main {
    /**
     * 思路：
     * f[i] 表示 这个和是否存在
     * f[i] 存在 说明了什么 i * (tot - i) 存在
     */
    static FastReader sc = new FastReader();
    static PrintWriter out = new PrintWriter(System.out);
    static int N = 400010;
    static int[] a = new int[]{5160,9191,6410,4657,7492,1531,8854,1253,4520,9231,1266,4801,3484,4323,5070,1789,2744
            ,5959,9426,4433,4404,5291,2470,8533,7608,2935,8922,5273,8364,8819,7374,8077,
            5336,8495,5602,6553,3548,5267,9150,3309};
    static boolean[] f = new boolean[N];
    static int n;

    public static void main(String[] args) {
        f[0] = true;
        int m = 0;
        for (int x : a) m += x;
        for (int x : a) {
            for (int j = m; j >= x; j--) {
                f[j] |= f[j - x];
            }
        }
        long res = 0;
        for (int i = 1; i <= m; i++) {
            if (f[i]) res = Math.max(res, (long) i * (m - i));
        }
        out.println(res);
        out.flush();
    }
}

class FastReader {
    StringTokenizer st;
    BufferedReader br;

    FastReader() {
        br = new BufferedReader(new InputStreamReader(System.in));
    }

    String next() {
        while (st == null || !st.hasMoreElements()) {
            try {
                st = new StringTokenizer(br.readLine());
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return st.nextToken();
    }

    int nextInt() {
        return Integer.parseInt(next());
    }

    String nextLine() {
        String s = "";
        try {
            s = br.readLine();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return s;
    }

    long nextLong() {
        return Long.parseLong(next());
    }

    double nextDouble() {
        return Double.parseDouble(next());
    }

    // 是否由下一个
    boolean hasNext() {
        while (st == null || !st.hasMoreTokens()) {
            try {
                String line = br.readLine();
                if (line == null)
                    return false;
                st = new StringTokenizer(line);
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
        }
        return true;
    }
}

